Abstract: An infusion device for subcutaneously administering a medication or a therapeutic fluid to a patient includes a base element which has fluid receiving means for receiving the fluid and fluid communication means for transferring the fluid into a cannula. The base element has at least one recess accommodating a septum that is pierceable by a needle. The septum is secured to the base element by a septum housing in such a way that a fluid transfer volume is formed in the recess between an internal surface of the septum and an inner section of the recess. The fluid transfer volume is in communication with the fluid communication means, and the septum housing accommodates a premounted septum. The septum housing is fixed and fluid sealed to the base element in the inner section of the recess.

Abstract: The invention concerns an infusion device for subcutaneous administering a medication or a therapeutic fluid to a patient. Said infusion device comprises a base element (1), which comprises fluid receiving means for receiving said fluid and fluid communication means for transferring said fluid into a cannula, said base element being provided with at least one recess (20) accommodating a septum (5) being pierceable by a needle. Said septum is secured to said base element by a septum housing (3) in such a way that a fluid transfer volume is formed in said at least one recess between an internal surface of said septum and an inner section of said recess. Said fluid transfer volume is communicating with said fluid communication means, and said septum housing is accommodating a premounted septum. The infusion device is characterized in that the septum housing is fixed and fluid sealed to said base element in said inner section of said recess.